Input device for sewing machine

Abstract

An input device for sewing machines comprising a means for making visible the sewing pattern up to the inflection point immediately followed by the inflection point to be modified to facilitate the modification of the sewing pattern, a means for inputting the coordinate data of the inflection point to be modified, a means for indicating the contents of the modification, and a means for operating the contents of the modification thus indicated under a predetermined control.

What is claimed is: 
     
       1. An apparatus for use with a sewing machine for and modifying a sewing pattern to be sewn on a workpiece, said apparatus comprising: sewing pattern inputting means for inputting coordinate values of a sewing pattern to be sewn on the workpiece;   modification type indication means for indicating absolute point modification of an inflection point in the inputted sewing pattern;   first means for inputting coordinate values of a modification point to replace the coordinate values of the inflection point to be modified;   second means for making visible a portion of the sewing pattern by an inflection point immediately before the inflection point to be modified; and   sewing pattern modification means for modifying relative coordinate values of each of the sewing points between the modification point and an inflection point immediately before the inflection point to be modified in accordance with coordinate values of the modification point and the inflection point immediately before the inflection point to be modified and for modifying the relative coordinate values of each of sewing points between the modification point and an inflection point immediately after the inflection point to be modified in accordance with coordinate values of the modification point and the inflection point immediately after the inflection point to be modified.   
     
     
       2. An apparatus for use with a sewing machine and for modifying a sewing pattern to be sewn on a workpiece, said apparatus comprising: sewing pattern inputting means for inputting coordinate values of a sewing pattern to be sewn on the workpiece;   modification type indication means for indicating relative point modification for modifying an inflection point to be modified in the inputted sewing pattern whereby each of the inflection points after the inflection point to be modified maintains a relative relation between each of the inflection points;   first means for inputting coordinate values of a modification point to replace the coordinate values of the inflection point to be modified;   second means for making visible a portion of the sewing pattern by an inflection point immediately preceding said inflection point to be modified; and   sewing pattern modification means for calculating coordinate value variations between the modification point and the inflection point to be modified and for modifying the coordinate values of each of the inflection points after the inflection point to be modified by adding the calculated coordinate value variations to each of the inflection points after the inflection to be modified and for modifying relative coordinate values of each of the sewing points between the modification point and the inflection point immediately preceding the inflection point to be modified in accordance with coordinate values of the modification point and the inflection point immediately preceding the inflection point to be modified.   
     
     
       3. Apparatus for use with a sewing machine and for modifying a sewing pattern to be sewn on a workpiece, said apparatus comprising: sewing pattern inputting means for inputting coordinate values of a sewing pattern to be sewn on the workpiece;   modification type indication means for indicating an inflection point relative elimination mode for eliminating an inflection point in the inputted sewing pattern whereby each of the inflection points after the inflection point to be eliminated maintains a relative relation between each of the inflection points;   first means for inputting coordinate values of the inflection point to be eliminate as coordinate values of a relative elimination inflection point;   second means for making visible the sewing pattern by an inflection point immediately preceding the inflection point to be eliminated; and   sewing pattern modification means for calculating coordinate value variation between the relative elimination inflection point and an inflection point immediately preceding the inflection point to be eliminated and for modifying coordinate values of each of inflection points after the inflection point to be eliminated by adding the calculated coordinate value variations to each of the inflection points after the inflection point to be eliminated and for eliminating coordinate values of each of the sewing points between the relative elimination inflection point and an inflection point immediately preceding the inflection point to be eliminated and coordinate values of the relative elimination inflection point and for modifying coordinate values of the modified inflection points as coordinate values of inflection points after the inflection point immediately preceding the inflection point to be eliminated.   
     
     
       4. An apparatus for use with a sewing machine and for modifying a sewing pattern to be sewn on a workpiece, said apparatus comprising: sewing pattern inputting means for inputting coordinate values of a sewing pattern to be sewn on the workpiece;   modification type indication means for indicating a reinputted modification for eliminating an inflecting point to be eliminated in the inputted sewing pattern whereby a sewing pattern after an inflection point immediately preceding the inflection point to be eliminated is eliminated;   first means for inputting coordinate values of the inflection point to be eliminated;   second means for making visible the sewing pattern by the inflection point immediately preceding the inflection point to be eliminated; and   sewing pattern modification means for eliminating the inputted sewing pattern after the inflection point immediately preceding the inflection point to be eliminated and enabling the reinput of the remaining sewing pattern.